Author here, thanks for reading and commenting! Indeed my conclusion is that "agent" means different things to different people. The idea for this post was to explore what's there already and what may be missing for using SQL in this context. When following Anthropic's taxonomy, as of today, SQL let's you get quite far for building workflows. For agents in their terminology, some more work is needed to integrate things like MCP, but I don't see any fundamental reasons for why this couldn't be done.